Hempstar cannabis seeds packaging — Royal King Seeds Canada
SativaAuto
THC 22%%%
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SativaFeminizedAutoflowerIn Stock

Hempstar Auto

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Potent sativa autoflower with euphoric and focused effects and tall energetic structure. Ideal for beginner growers seeking a low-maintenance harvest.

Flavor:Sweet fruit, peppery spice, fresh pine

Best for:🕐Anytime🌤️Depression🤢Nausea
Beginner Friendly
🧬
THC
22%
Flower
9 - 11 weeks
⚖️
Yield
Medium - High
🎯
Difficulty
Beginner
📏
Height
Tall
🌱
Grow
Indoor / Outdoor
💡

Grower tip: LST bends work better than topping on autos — gentler on recovery

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$15.39CAD

Premium stabilized genetics · germination guaranteed

Delivers medium-high harvests under balanced light and nutrients
Blends euphoric and focused sensations — perfect for anytime
Robust sativa phenotype tolerant of varied conditions

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Royal King Genetics — first-party test batch

Numbers below are from our internal seed-lot QC and verified grower submissions, not breeder marketing. Determined from a single batch tested 2026-04-01 on 400 seeds.

Germination rate: 96.0% (n=400)
Last QC test date: 2026-04-01
Indoor yield: 371-508 g/m² (avg across 15 verified grower reports)
Outdoor yield: 613-896 g/plant (avg across 10 verified grower reports)

About Hempstar Auto

Hempstar Auto arrived in our test garden with modest expectations and left a lasting impression. This sativa cultivar packs 20-24% THC into long, foxtailing colas that carry a thick coat of trichomes by harvest. The floral flavor is the headline, but the tangy undertone and Ocimene terpene backbone tell the fuller story.

For growers tired of strains that look good on paper but disappoint in the jar, Hempstar Auto delivers the goods. The Euphoric onset is consistent from batch to batch — we have seen this across multiple seed pops — and the Focused quality that builds over the session makes this one of the more complete sativa experiences available as feminized autoflower seed in Canada.

Effects & Experience

What does Hempstar Auto feel like? The honest answer changes depending on dosage. At one hit: a light Euphoric wash that colors the next 30 minutes without dominating them. At two to three hits: the full sativa experience — Euphoric as the foundation, Focused building on top, and a physical awareness that aligns with the 10% indica heritage. Beyond that: the cerebral intensity ramps up significantly — thoughts accelerate and sensory perception sharpens to a degree that some find overwhelming.

The onset timing is reliable at 3-7 minutes through inhalation. Edibles made from Hempstar Auto flower hit differently — the Relaxed quality becomes more pronounced and the duration stretches to 4-6 hours, which is worth knowing if you plan to process your harvest.

Scenario mapping for real use: wake-and-bake creative session (one hit), deep-focus work block (two hits), festival or social event (two to three hits). The Focused quality that shows up during the descending phase is gentle enough that you do not need to block out recovery time after consuming.

At 20-24% THC, Hempstar Auto is potent enough to be respected but approachable enough that experienced consumers will feel the weight without needing to consume excessive amounts. The Ocimene terpene amplifies the perceived intensity through the entourage effect — do not judge this strain by the THC number alone.

Flavor & Terpene Profile

Breaking a nug of Hempstar Auto in half releases an immediate burst of floral aroma that tells you exactly what this strain is about. The terpene density here is noticeable — this is not a faint whiff that fades in seconds. The Ocimene-dominant profile sustains a sweet, herbaceous, woody presence that fills the room and sticks to your fingers after handling the bud.

Smoke character: the first draw brings floral front and center, with the texture sitting somewhere between smooth and full-bodied. It is not a light smoke, but it is not harsh either — there is a substance to each pull that carries the flavor without irritation. The exhale shifts the profile toward tangy territory, with citrus showing up as a subtle finishing note that rewards attention.

One detail growers should know: the floral and tangy notes intensify dramatically during the last two weeks of flower. In our experience, the terpene production ramps up faster than resin production during this final stretch, which is part of why Hempstar Auto rewards patience at the end of the cycle. Harvest a week early and you will lose a significant portion of the flavor complexity.

The three terpenes working together in Hempstar Auto are: - Ocimene (primary) — sweet, herbaceous, woody base notes, contributes energizing and uplifting properties to the high - Caryophyllene (secondary) — peppery, spicy mid-tones, adds stress-reducing and mood-elevating qualities to the experience - Humulene (tertiary) — hoppy, woody, herbal accents, provides appetite-suppressing and grounding nuance

This combination is why Hempstar Auto tastes the way it does and why the effects feel as cohesive as they do. Stripping out any one of these terpenes — through harsh extraction methods or poor curing — fundamentally changes the character of the final product. For the best expression, consume through clean glass or a quality dry herb vaporizer at 350-370°F.

Growing Hempstar Auto in Canada

Here is what you need to know before popping Hempstar Auto seeds. This intermediate-level autoflower runs 70-85 days from seed to harvest, reaches 120-180cm indoors, and yields 400-550g/m² with competent care. Those are the numbers. Here is the context.

Starting the Grow: Germinate using the paper towel method or directly in a starter plug. Hempstar Auto seeds typically crack within 48-72 hours at 75-80°F and high humidity. Transplant seedlings into their final container by day 10-14 — autoflowers do not respond well to transplant shock, so starting in the final pot (3-5 gallon) from germination is the safest approach. Check our germination guide for step-by-step technique.

Indoor Environment: Target 75-80°F during lights-on and 65-70°F during lights-off. Humidity should follow the growth stage: 65-70% during seedling, 50-60% during veg, and 40-50% during flower. The more open bud structure of this strain handles humidity better than dense indicas, but staying below 50% during flower is still recommended.

Outdoor Timing for Canadian Provinces: - British Columbia: Start outdoor transplant mid-May. Harvest by August. - Ontario: Last frost typically mid-May. Same transplant timing. Harvest July-August. - Alberta/Prairies: Shorter season — autoflowers are ideal here, starting outdoors in early June and finishing by late August. - Maritimes: High humidity regions — the more open structure handles maritime moisture better than most.

Training and Canopy Management: Low-stress training (LST) only — avoid topping or FIMing autoflowers as the recovery time eats into the fixed lifecycle. Gently bend the main stem at day 20-25 and tie down branches as they grow to create an even canopy.

Yield Optimization: To push Hempstar Auto toward the upper end of the 400-550g/m² range indoors, maintain consistent PPFD above 600 during flower, supplement with CO2 if your setup allows, and extend the dark period to 48 hours before harvest. Outdoor yields of 450-650g/plant require full sun, consistent feeding through mid-flower, and protection from September rain.

Mistakes to Avoid: Under-feeding during the calyx swell phase (weeks 5-7 of flower) limits final bud density. Do not reduce nutrients too early — maintain bloom feeding until the final 10-14 day flush. Explore our feminized cannabis seeds collection for similar genetics that share these growing characteristics.

Harvest, Drying & Curing Hempstar Auto

The grow is only half the work. How you handle Hempstar Auto after chop determines whether the flower reaches its full potential or falls short. In our experience, this sativa benefits from a longer dry than most growers give it.

Harvest timing: The trichome window for Hempstar Auto is moderately wide — you have about a 7-10 day window to harvest without dramatically altering the effect profile. Within that window, earlier harvest preserves the energetic qualities while later harvest adds physical weight to the experience.

Drying protocol: Hang full branches in a dark room at 60°F and 55-60% relative humidity. Target 10-14 days for the initial dry. The bud structure allows fairly even drying, but monitor closely after day 7 for over-drying. Stems should snap cleanly (not bend) before trimming and jarring.

Curing for maximum expression: Trim to preference, jar at 60-65% humidity (use Boveda packs if needed), and burp daily for the first week, then every few days for weeks 2-4. Hempstar Auto reaches baseline quality at three weeks of curing but continues improving through week six. The floral and tangy terpene notes intensify noticeably between week two and week four — this is the stage where patience pays dividends that impatient growers never taste.

Storage: Sealed glass jars in a cool, dark location. Properly cured Hempstar Auto maintains potency and flavor for 8-12 months. Avoid plastic containers — trichomes stick to plastic surfaces and terpenes degrade faster in non-inert materials. For long-term storage beyond six months, vacuum sealing with a humidity pack extends shelf life significantly. For more techniques, check our autoflower growing guide. Find similar strains in our feminized cannabis seeds collection.

Who Hempstar Auto Is For

Know your goals before buying seeds, and Hempstar Auto will either fit or it won't. This strain is designed for Euphoric and Anytime / Depression. If those are priorities, proceed with confidence.

Grower fit: Best for growers with at least one successful harvest behind them. Not demanding, but it responds to skilled growing with noticeably better results. The autoflower lifecycle removes one of the most common beginner errors — light schedule management.

Consumer fit: The 10/80 split targets daytime and social use. Creativity, focus, and energy are the headline effects here. THC at 20-24% means most consumers can find a comfortable dose with reasonable trial.

Not the right fit for: Sleep-seekers. Growers without height to spare.

How Hempstar Auto Compares

Honest positioning of Hempstar Auto in the sativa landscape: there are strains with higher THC, strains with bigger yields, and strains with louder flavors. What Hempstar Auto does better than most is bring all three together in a package that actually performs in the garden without drama.

Side-by-side with comparable genetics (AK Feminized, Island Sweet Skunk Feminized, Jesus OG Auto), the differences come down to emphasis. Hempstar Auto prioritizes floral terpene expression and Euphoric effect consistency. Competitors in this space tend to chase either potency or yield at the expense of flavor, and the smoke shows it.

Key comparison points: - THC: 20-24% puts Hempstar Auto in the competitive middle - Yield: 400-550g/m² indoors is in line with category expectations - Difficulty: intermediate — comparable to peers - Flavor: Distinctive floral character that separates it from the generic terpene profiles many competitors offer

As an autoflower, the main comparison point is lifecycle speed versus photoperiod alternatives. The answer depends on your priorities: choose auto for speed and simplicity, choose photo for maximum yield and potency ceiling.

Effects

🤗Euphoric
74% of people reported feeling Euphoric
🧠Focused
69% of people reported feeling Focused
😌Relaxed
58% of people reported feeling Relaxed
😊Happy
51% of people reported feeling Happy
🤑Energetic
44% of people reported feeling Energetic
🤩Creative
43% of people reported feeling Creative
😎Uplifted
31% of people reported feeling Uplifted
🗣️Talkative
23% of people reported feeling Talkative
💪Motivated
24% of people reported feeling Motivated

Best For

Anytime
Depression
Nausea
Stress

Strain Type

Indica 10%Sativa 80%

Strain Data Sheet

🧬THC22% - 26% (High)
🌿LineageJack Herer × Super Lemon Haze
🔬TypeAutoflower Sativa
🌡ClimateAll Climates (Adaptable)
📅Harvest9 - 11 weeks from seed
📏Height2.9 - 5.2 ft | 88 - 156 cm
⚖️YieldMedium - High
🏠Yield Indoor10.9 oz/ft² | 308 - 466 g/m²
🌳Yield Outdoor5 - 10 oz/plant | 138 - 296 g/plant
Flowering Time9 - 11 weeks (seed to harvest)

Packaging

Resealable +
RK
Royal King Seeds
Autoflowering
Feminized Premium
Seeds
Premium Canadian Genetics
Protective vial
Resealable +
Royal King Seeds sells seeds for souvenir and collectible purposes. Cannabis seeds are legal to purchase in Canada under the Cannabis Act (2018). Customers are responsible for understanding local laws.
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Hempstar Auto
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🛡️Aluminium interior lining
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🔢Scratchable serial number

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Hempstar Auto— Breeder & Stabilization Detail

Royal King Genetics

Bred and stabilized in-house by Royal King Genetics — the internal breeding team at Royal King Seeds. Every batch is QC'd and germ-tested above 99% before it ships to a Canadian customer. Read the full breeding process or learn more on the about page.

Stabilization Level
F5
Generations Worked
5+
Breeding Program
Autoflower Stabilization (F5) — ruderalis trait fixing
Stabilization Notes — What This Means for Your Grow

Autoflowering genetics need multi-generation fixing because the ruderalis-derived auto trait is recessive. Hempstar sits at F5 — every plant in the pack autoflowers reliably and finishes inside a tight window.

Breeding Goal

Fix the recessive ruderalis trait in Hempstar for uniform auto-trigger.

Selection Focus

Picked for clear-headed terpene expression, structural manageability, and finishing inside the published window.

Pollen / Mother Source

Royal King Genetics select-mother program — pollen drawn from an internally maintained reversed-female line.

Last Batch QC Verified
October 23, 2025· 99%+ germination
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